<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>f2加加减减</title>
  </head>
  <body>
    <div id="app">
      <ul v-for="item in list" :key="item.id">
        <li>{{ item.num }} <button @click="del(item.id)">删除</button></li>
      </ul>
      <button @click="add">生成</button>
    </div>
    <script src="../vue.js"></script>
    <script>
      const app = new Vue({
        el: "#app",
        data: {
          list: [
            { id: 1, num: 3 },
            { id: 2, num: 6 },
            { id: 3, num: 8 },
            { id: 4, num: 7 },
            { id: 5, num: 1 },
            { id: 6, num: 5 },
          ],
        },
        methods: {
          add() {
            this.list.push({
              id: this.list.length + 1,
              num: Math.floor(Math.random() * 20),
            });
          },
          del(id) {
            this.list = this.list.filter((item) => item.id !== id);
          },
        },
      });
    </script>
  </body>
</html>
